Abstract
A cognitive aging model was set up by using the method of Structure Equation Modelling (SEM) in the test indicators of 5 cognitive abilities, such as perceptual speed, mental arithmetic efficiency, working memory, short-term memory and reasoning, and in 232 subjects of 20-79 years of age. The model revealed: (1) Age had a negative effect on speed significantly, and education had a positive effect on speed significantly; (2) The effects of age and education on the nonspeed cognitive abilities were mediated by speed, and education had an effect on the nonspeed cognitive abilities directly. The results indicated that speed was an important mediator of age-related differences in nonspeed abilities, and education played an important role in cognitive aging process.
| Keywords: | cognition; age; education; structure equation modelling (SEM) |
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